1. Announcements
Exam 1 Grades Posted on Blackboard

2. Iteration
Iteration (Looping): Performing a Series of Statements Multiple Times until Some Condition Is Met.
Eliminates the Need for Redundant Coding or Function Calls
Many Ways to Loop in C++

3. The while Loop Syntax: while (condition) statement; while (condition){
statement; }

4. while Example const int MAX = 100; int counter = 0;
while (counter < MAX) {
cout << counter << endl;
counter++; }

5. Example while Loop int numEmployees,curNum = 0;
cout << “Enter Number of Employees: “;
cin >> numEmployees;
if (numEmployees > 0) {
while (curNum < numEmployees)
cout << “Welcome to CorpLand!” << endl;
curNum++; }

6. The for Loop Syntax: Same as: for (expression1;condition; expression2)
statement; { }
Same as:
expression1;
while (condition)
expression2;

7. Example for Loop int numEmployees,curNum;
cout << “Enter Number of Employees: “;
cin >> numEmployees;
if (numEmployees > 0) {
for (curNum = 0; curNum < numEmployees;curNum++)
cout << “Welcome to CorpLand!” << endl; }

8. Looping for Input char letterEntered = ‘A’;
while (letterEntered != ‘Z’) {
cout << “Enter a letter: “;
cin >> letterEntered; }

9. Looping until Flag bool noMoreData(); bool done = false; …
while (!done) {
// do a bunch of stuff
if (noMoreData() == true)
done = true; }
cout << “We’re all through – thank you!”;

10. Nested Loops int i , j ; for (i=0; i < 10; i++) {
for (j=0; j < 10; j++)
cout << i << j << “ “; }
cout << endl;

11. The do-while Loop
Syntax do
statement;
while (condition); { }

12. do-while Example char letterEntered; do {
cout << “Enter a letter: “;
cin >> letterEntered; }
while (letterEntered != ‘Z’);

13. What Is This? while (stringEntered != “apple”) {
cout << “Enter a red fruit: “;
cin >> stringEntered; }
while (stringEntered != “banana”)
cout << “Enter a yellow fruit: “;
while (stringEntered != “pomegranate”)
cout << “Enter a random fruit: “;

14. What Is This? for (i = 0; i < 10 ; i++)
cout << “Interesting, isn’t it?” << endl;
while (answer != ‘D’) {
cout << “Enter an answer: “;
cin >> answer; }

15. What Is This? void kingsChair(int loopCounter) { int num;
for(num = 0; num < loopCounter; num++)
cout << “AAAAAAAAAAAAAAAAAAAAAAAAAA” << endl; }